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/*
 * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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package com.sun.tools.javac.comp;

import java.util.AbstractQueue;
import com.sun.tools.javac.util.Context;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Queue;
import javax.tools.JavaFileObject;

/** A queue of all as yet unattributed classes.
 *
 *  

This is NOT part of any supported API. * If you write code that depends on this, you do so at your own risk. * This code and its internal interfaces are subject to change or * deletion without notice. */ public class Todo extends AbstractQueue> { /** The context key for the todo list. */ protected static final Context.Key todoKey = new Context.Key(); /** Get the Todo instance for this context. */ public static Todo instance(Context context) { Todo instance = context.get(todoKey); if (instance == null) instance = new Todo(context); return instance; } /** Create a new todo list. */ protected Todo(Context context) { context.put(todoKey, this); } public void append(Env env) { add(env); } @Override public Iterator> iterator() { return contents.iterator(); } @Override public int size() { return contents.size(); } public boolean offer(Env e) { if (contents.add(e)) { if (contentsByFile != null) addByFile(e); return true; } else { return false; } } public Env poll() { if (size() == 0) return null; Env env = contents.remove(0); if (contentsByFile != null) removeByFile(env); return env; } public Env peek() { return (size() == 0 ? null : contents.get(0)); } public Queue>> groupByFile() { if (contentsByFile == null) { contentsByFile = new LinkedList>>(); for (Env env: contents) { addByFile(env); } } return contentsByFile; } private void addByFile(Env env) { JavaFileObject file = env.toplevel.sourcefile; if (fileMap == null) fileMap = new HashMap(); FileQueue fq = fileMap.get(file); if (fq == null) { fq = new FileQueue(); fileMap.put(file, fq); contentsByFile.add(fq); } fq.fileContents.add(env); } private void removeByFile(Env env) { JavaFileObject file = env.toplevel.sourcefile; FileQueue fq = fileMap.get(file); if (fq == null) return; if (fq.fileContents.remove(env)) { if (fq.isEmpty()) { fileMap.remove(file); contentsByFile.remove(fq); } } } LinkedList> contents = new LinkedList>(); LinkedList>> contentsByFile; Map fileMap; class FileQueue extends AbstractQueue> { @Override public Iterator> iterator() { return fileContents.iterator(); } @Override public int size() { return fileContents.size(); } public boolean offer(Env e) { if (fileContents.offer(e)) { contents.add(e); return true; } return false; } public Env poll() { if (fileContents.size() == 0) return null; Env env = fileContents.remove(0); contents.remove(env); return env; } public Env peek() { return (fileContents.size() == 0 ? null : fileContents.get(0)); } LinkedList> fileContents = new LinkedList>(); } }





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